11140644 has 48 divisors (see below), whose sum is σ = 27857088. Its totient is φ = 3452928.

The previous prime is 11140639. The next prime is 11140651. The reversal of 11140644 is 44604111.

It is a super-2 number, since 2×11140644² = 248227897469472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11140644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19507 + ... + 20069.

It is an arithmetic number, because the mean of its divisors is an integer number (580356).

Almost surely, 2^11140644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11140644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13928544).

11140644 is an abundant number, since it is smaller than the sum of its proper divisors (16716444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11140644 is a wasteful number, since it uses less digits than its factorization.

11140644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 11140644 is about 3337.7603269258. The cubic root of 11140644 is about 223.3418446795.

Adding to 11140644 its reverse (44604111), we get a palindrome (55744755).

It can be divided in two parts, 111 and 40644, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 11140644 in words is "eleven million, one hundred forty thousand, six hundred forty-four".